RV-3, -4, -6, -7, -8, -9, & -10
The installation of the Ellison Throttle Body Injector ("TBI") on tightly
cowled sport aircraft, such as the RV-3, -4, and -6,
requires careful attention to induction system design. The air inlet, carburetor heat
system, carburetor and intake manifold are all aerodynamic devices. For maximum
performance these devices require the same careful design as other aerodynamic devices
such as wings, flaps or ailerons. Careful planning and testing will result in an
installation with maximum power, fuel economy and dependability.
Dick VanGrunsven has designed a special inlet /carburetor
heat airbox for use with the TBI, which does a good job of delivering smooth inlet
air. Basic design suggestions relating to inlet airbox configuration
are available by clicking Inlet Airbox. Click
carburetor heat for an explanation of its
importance in a TBI installation.
On RV aircraft, TBI orientation that activates
the throttle in a spanwise direction will generally yield better performance than one in
which the slide moves fore and aft.
See comments related to vapor formation,
fuel filtration, and
suggestions when planning aTBI installation on an RV aircraft.